전기방사에 의한 가교결합된 폴리비닐 알코올 나노섬유 제조와 특성 Preparation and Characterization of a Nanoscale Crosslinked Poly(vinyl alcohol) Fiber Aggregate Produced by an Electrospinning Method원문보기
폴리비닐알코올(poly (vinyl alcohol), PVA)은 우수한 화학적, 물리적 특성 그리고 생체분해성의 특성을 가지고있어서 여러 분야에 걸쳐서 두루 사용되어지고 있다. 그러나, 폴리비닐 알코올이 섬유상에서는 물에 의해 분해되기 때문에 그것의 사용이 제한되어진다. 반면에 전기방사로 제조된 나노섬유 ...
폴리비닐알코올(poly (vinyl alcohol), PVA)은 우수한 화학적, 물리적 특성 그리고 생체분해성의 특성을 가지고있어서 여러 분야에 걸쳐서 두루 사용되어지고 있다. 그러나, 폴리비닐 알코올이 섬유상에서는 물에 의해 분해되기 때문에 그것의 사용이 제한되어진다. 반면에 전기방사로 제조된 나노섬유부직포는 상업적으로 제조되는 부직포와 비교했을 때 상대적으로 큰 비표면적과 작은 기공으로 이루어져 있기 때문에 필터영역이나 의료용 재료로 사용 될 수 있는 특성을 가지고 있다. 본 연구에서는 직경이 100-500nm 폴리비닐알코올 부직포를 전기방사법에 의해 제조를 하고, 화학적 가교방법을 이용해서 나노 크기의 폴리비닐알코올 섬유들을 가교화 한다. 열분석(DSC), X선 회절, 주사전자현미경 등을 사용하여 폴리 비닐알코올 섬유들의 특성을 분석하였다. 글리옥살(Gyloxal)의 ◁이후 원본누락▷
폴리비닐알코올(poly (vinyl alcohol), PVA)은 우수한 화학적, 물리적 특성 그리고 생체분해성의 특성을 가지고있어서 여러 분야에 걸쳐서 두루 사용되어지고 있다. 그러나, 폴리비닐 알코올이 섬유상에서는 물에 의해 분해되기 때문에 그것의 사용이 제한되어진다. 반면에 전기방사로 제조된 나노섬유 부직포는 상업적으로 제조되는 부직포와 비교했을 때 상대적으로 큰 비표면적과 작은 기공으로 이루어져 있기 때문에 필터영역이나 의료용 재료로 사용 될 수 있는 특성을 가지고 있다. 본 연구에서는 직경이 100-500nm 폴리비닐알코올 부직포를 전기방사법에 의해 제조를 하고, 화학적 가교방법을 이용해서 나노 크기의 폴리비닐알코올 섬유들을 가교화 한다. 열분석(DSC), X선 회절, 주사전자현미경 등을 사용하여 폴리 비닐알코올 섬유들의 특성을 분석하였다. 글리옥살(Gyloxal)의 ◁이후 원본누락▷
Poly(vinyl alcohol) (PVA) has excellent chemical resistance, physical properties and completely biodegradable which led to their broad practical applications. But, its applications were limited by its high hydrophilicity, especially in fiber state. On the other hand, the electrospun fibers have a la...
Poly(vinyl alcohol) (PVA) has excellent chemical resistance, physical properties and completely biodegradable which led to their broad practical applications. But, its applications were limited by its high hydrophilicity, especially in fiber state. On the other hand, the electrospun fibers have a large specific surface area and small pore size compared to commercial textile, making them excellent candidates for use in filtration and biomedical materials. In our work, the nanoscaled PVA fibers (100-500nm) were prepared by using electrospinning technique, and the chemical crosslinking method was used to crosslink the nanoscaled PVA fibers. Differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), scanning electron microscope (SEM) techniques were employed to characterize the PVA fibers. The different crosslinking densities of PVA fibers were obtained by controlling the weight percent of glyoxal to PVA. The crosslinking densities of heat treatment and chemical crosslinking were studied. The influence of heat treatment can be neglected contrasted with chemical crosslinking when the curing temperature is 120 ℃ It was found that the primary factor which affect the crosslinking density was the volume of chemical crosslinking agent. The results showed that the entirely crosslinked PVA fibers have better anti-water solubility and mechanical properties than the noncrosslinked PVA fibers.
Poly(vinyl alcohol) (PVA) has excellent chemical resistance, physical properties and completely biodegradable which led to their broad practical applications. But, its applications were limited by its high hydrophilicity, especially in fiber state. On the other hand, the electrospun fibers have a large specific surface area and small pore size compared to commercial textile, making them excellent candidates for use in filtration and biomedical materials. In our work, the nanoscaled PVA fibers (100-500nm) were prepared by using electrospinning technique, and the chemical crosslinking method was used to crosslink the nanoscaled PVA fibers. Differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), scanning electron microscope (SEM) techniques were employed to characterize the PVA fibers. The different crosslinking densities of PVA fibers were obtained by controlling the weight percent of glyoxal to PVA. The crosslinking densities of heat treatment and chemical crosslinking were studied. The influence of heat treatment can be neglected contrasted with chemical crosslinking when the curing temperature is 120 ℃ It was found that the primary factor which affect the crosslinking density was the volume of chemical crosslinking agent. The results showed that the entirely crosslinked PVA fibers have better anti-water solubility and mechanical properties than the noncrosslinked PVA fibers.
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